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Investment Securities - Summary of Interest Income Earned on Investment Securities (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net Investment Income [Line Items]
Investment securities available-for-sale	$ 68,508	$ 38,273	$ 36,052
Investment securities held-to-maturity	49,048	22,175	14,223
Total investment income	117,556	60,448	50,275
Investment securities available-for-sale [Member]
Net Investment Income [Line Items]
Taxable	67,803	37,532	35,129
Tax-advantaged	705	741	923
Investment securities available-for-sale	68,508	38,273	36,052
Investment securities held-to-maturity [Member]
Net Investment Income [Line Items]
Taxable	41,403	17,747	9,542
Tax-advantaged	7,645	4,428	4,681
Investment securities held-to-maturity	$ 49,048	$ 22,175	$ 14,223

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Interest income from available for sale securities.

+ References

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- Definition

Amount of operating dividend and interest income, including amortization and accretion of premiums and discounts, on securities.

+ References

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- Definition

Amount of operating interest income, including amortization and accretion of premiums and discounts, on held-to-maturity securities.

+ References

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- Definition

Amount of operating interest income, including amortization and accretion of premiums and discounts, on securities subject to tax benefits. Excludes operating interest income on securities exempt from state, federal and other income tax.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.2)
-URI https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260

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Amount of operating interest income, including amortization and accretion of premiums and discounts, on securities subject to state, federal and other income tax.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.2)
-URI https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1402
-Paragraph (a)

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-K (SK)
-Number 229
-Section 1402
-Paragraph (b)
-Subparagraph (1)

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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